Field Strength Meter with Signal Connection Cables
- Cost effective simple solution for measuring, setting up and commissioning a hearing loop system to the requirements of IEC60118-4, updated in 2006.
- Three modes of operations for three test types. A-weighted background noise, broad band mode (50 Hz - 8 kHz) and frequency response (100 Hz, 1 kHz, 5 kHz).
- Includes the Signal Connection Cables
The field strength meter is a cost effective and simple solution for measuring, setting up and commissioning an hearing loop system to the requirements of IEC60118:2006 standard. The meter is an ergonomically designed hand held instrument for measuring loop system performance. There are three calibrated operational modes for the assessment of background noise, field strength and frequency response as required to ensure correct function of the loop system. The meter also doubles as a loop receiver with a headphone output to listen to the signal in the loop.
The field strength meter shall measure the background noise by determining the level of background magnetic field present in the intended location for the loop system. It shall measure the field strength delivered by the system. The meter shall measure the performance of the frequency spectrum required by IEC60118:2006 standard. It shall have an audio output to allow to the signal to be heard through a headphone or earspeaker. The meter shall include a LED graph with a wide view angle that is color coded. It shall accept two (2) AA alkaline batteries and display an illuminated LED when the battery is at acceptable level. It shall include signal connection cables to allow testing with other devices. The FSM Field Strength Meter is specified.
|Measurement||Coil Orientation||Vertical when held upright|
|Reference Level||400 mA/m (In field strength mode)|
|Frequency Response||50 Hz to 8 kHz ±0.25 dB, 30 Hz to 10 kHz -3 dB|
|Gain Stability||Better then 0.5 dB over all conditions|
|Ouputs||LED Bar Graph||Color Coded - Green for -3 to +3 dB, Red for -4 to -22 dB|
|Audio||3.5 mm Stereo Conenctor, 16 Ohms (32 Ohms per side)|
|Power||Battery||Two (2) x AA Alkaline|
|Battery Monitor||Battery OK when LED illuminated|
|Battery Life||Up to 100 hrs. use, dependant on use pattern|
|Physical||Size||3.3 x 1.0 x 5.5 in. (84 x 27 x 140 mm) (WxDxH)|
|Weight||.33 lbs. (.15 kg)|
|Environment||IP20 Protection, 20 to 90% Relative Humidity, 14 F (-10 C) to 113 F (45 C)|
|Specifications are subject to change without notification|
Signal connections cables are used with an audio source to input a test signal into the loop driver for testing purposes.
Dual ear, over-the-head style earphones provide clear sound to both ears.
The AA batteries that offer twice the life of standard alkaline batteries. Use when you don't want to worry about recharging batteries.
One of Listen's most popular earpieces, the ear speaker fits easily over the ear.